You can keep the body as well-oiled and receptive as possible, but whether you're actually going to be able to go for the long haul is really not your own choice.
Leonard CohenWe all are motivated by deep impulses and deep appetites to serve, even though we may not be able to locate that which we are hoping to serve. So this is just a part of my nature and I think everybody else's nature to offer oneself at the critical moment when the emergency becomes articulate. It's only then that we can locate that willingness to serve.
Leonard Cohen